So, let's see how well these 3D printed guns work.......
What happened to a 3D printed gun at the range
I'm not claiming the real world results will be a LOT better than that, but I'm skeptical a .380 did THAT to the gun.
Just perhaps they used a .380 Mag, used PLA instead of ABS and maybe used a low percentage of infill. Then, yes, no question, that 'splosion would be the result.
Also, although they abbreviated the assembly a lot in the video, it didn't look like they'd added the slug, which would be a no no. Maybe they just didn't show it.
Finally, the bore doesn't actually dimension for a .380 as printed. A .32 would fit nicely, though and packs a good bit less punch.
If you REALLY want to shoot multiple rounds, size the frigging thing down to chamber a .22 and slightly offset the guide for the firing nail, I mean pin, so it strikes the rim. With that round, NO the Liberator is not going to blow up, even if you print with the tricks that I strongly suspect they used.
3d printed guns are real. They do work. They're no scarier than someone assembling their own AR or even finishing an 80%.
Oh, and fun fact: An AR-15 handgrip fits the Liberator perfectly.
Even scarier, SO does the handgrip from an M-16!!!! <shudder>
(Zapp, the note of sarcasm / venom in my post is borne from frustration with the simple minded Maura's of the world, not directed at you)